116 results about "Surface contour" patented technology

The present invention relates to a contour accuracy compensation method and system for a precision hot-press forming mold. The method comprises: delineating grids on a three-dimensional model of a hot-press forming mold to obtain mold surface grid data; performing curvature analysis to obtain a high-curvature region and a low-curvature region; performing high-density sampling on the high-curvature region, and performing low-density sampling on the low-curvature region, so as to obtain a sampling point set; using a coordinate measuring machine to perform three-dimensional coordinate measurement on the sampling point set to obtain surface contour data; performing comparative analysis on the surface contour data and a theoretical model to obtain a contour error distribution; on the basis of the contour error distribution, using an inverse distance weighted interpolation algorithm to perform interpolation operation on an entire mold surface to obtain a mold surface compensation amount distribution; and on the basis of the mold surface compensation amount distribution, correcting the three-dimensional model of the hot-press forming mold to generate a compensated mold processing model. The implementation of the present invention realizes intelligent and automated contour accuracy compensation.

The invention discloses a method and system for detecting surface defects of a sheet metal part before coating, and the method comprises the following steps: S1, multi-modal data collection: synchronously collecting three-dimensional point cloud data and a hyperspectral image of the surface of the sheet metal part through a laser three-dimensional contourgraph and a hyperspectral camera, and recording environment illumination and temperature parameters at the same time; s2, data preprocessing: performing denoising and smoothing processing on the three-dimensional point cloud, extracting surface contour features, and performing defective pixel repair, waveband selection and reflectivity correction on the hyperspectral image; according to the surface defect detection method and system before coating of the sheet metal part, through multi-modal data acquisition and fusion of the three-dimensional morphology and the hyperspectral features, compared with traditional single visual detection, the surface defects of the sheet metal part can be more comprehensively and accurately recognized, particularly, tiny defects and oxide layer defects which are difficult to distinguish by naked eyes, the recognition rate is remarkably increased, and the detection accuracy is improved. And by adopting the lightweight deep learning model, the detection precision is ensured, and the reasoning speed is improved at the same time.

To provide systems and methods for surface finishing.SOLUTION: A system for automated sanding of a surface of a component includes a model generator, a model analyzer, and a path planner. The model generator is configured to generate a model representing at least a portion of a surface of a component. The model analyzer is configured to analyze the model to determine waviness of the surface. The path planner is configured to generate a sanding plan.SELECTED DRAWING: Figure 2

The invention discloses a slope structural surface roughness coefficient testing method. The method comprises the core steps of structural surface pretreatment, rebound detection, contour curve drawing, roughness measurement and the like. Measuring areas are divided and identified, an average rebound value is obtained by using a rebound apparatus, a surface profile is drawn in combination with a profile curvimeter, and a roughness coefficient JRCn is read by using a multi-range roughness ruler and an electronic subdivision technology; in addition, parameters such as rock wall strength and normal stress can be obtained through a point load instrument, a vibrating wire strain gauge and the like, shear strength is calculated in combination with a Barton-Bandis mode, data of multiple measuring areas are integrated, and dynamic correction results of environmental parameters are associated. According to the method, the test precision and efficiency are improved, data integration and full-period management are realized, and a reliable basis is provided for slope stability evaluation.

The invention discloses an automatic ceramic glazing control system and method fusing machine vision and track planning, and relates to the technical field of ceramic production automation, and the method comprises the steps: obtaining basic information and glazing demand information of to-be-glazed ceramic; according to the automatic ceramic glazing control system and method fusing machine vision and trajectory planning, three-dimensional data are obtained by shooting ceramic images from multiple angles and scanning, the three-dimensional features of surface profiles, textures and tiny defects can be accurately captured, even pits and protrusions can be recognized, and when a glazing path is planned, the glazing quality is greatly improved. The angle of the nozzle can be adjusted in real time according to the surface morphology of the ceramic to ensure that glaze is sprayed perpendicular to an arc-shaped surface and a special-shaped surface, and meanwhile, the moving speed of the nozzle and the glaze output quantity are matched to avoid material consumption deviation per unit area; the glazing thickness uniformity and the coverage area precision are improved through mutual cooperation, the problems that coating of special-shaped ceramics is missed, and the thickness fluctuation of curved-surface products is large are solved, and the percent of pass of complex ceramic products is remarkably improved.

The invention discloses a three-dimensional pipe surface contour interference detection method and system, which are suitable for interference identification and screening of complex contours in a laser pipe cutting and nesting process. The method comprises the steps that the surface of a three-dimensional pipe is unfolded into a two-dimensional plane; a dynamic grid division structure is constructed based on the median of the contour size, and space region division and contour mapping are achieved; the contour retrieval efficiency is optimized through a Hash index and condition triggering type grid reconstruction mechanism; an improved GJK algorithm is adopted to carry out interference judgment on any contour pair, the algorithm supports dynamic decomposition of a concave contour through an ear cutting method, a virtual closed edge is constructed for a non-closed contour to participate in detection, meanwhile, a contour geometric center is utilized to guide search direction initialization, and convergence efficiency is improved. The method can quickly and accurately detect the interference relationship among multiple types of three-dimensional contours, has the advantages of high adaptability, high operation efficiency, reliable detection result and the like, and is suitable for scenes such as automatic laser cutting path planning and drawing preprocessing.

The application relates to a multi-arch synchronous installation process, which comprises the following steps: S1. Dividing arches into at least one middle section and multiple side sections according to the arch span required by a tunnel, and hingedly connecting the middle section and the side section at the inner arc sides of the two or hingedly connecting the middle section and another middle section at the inner arc sides of the two; S2. Welding cross ribs and meshes on the middle section and the side section; S3. Hoisting the middle section and the side section hingedly connected thereto into the tunnel together, lifting the middle section to make the middle section fit the tunnel dome, lifting the side section to make the side section fit the upper part of the tunnel side, locking the middle section and the side section or the middle section and another middle section, and supporting the connecting part of the two along the arc surface contour; and S4. Installing another side section on the ground of the tunnel side to support the side section connected with the middle section, and locking the two adjacent side sections. The application has the effect of significantly improving the shearing resistance of the joint part of the multi-arch, thereby improving the bearing capacity and the structural stability of the multi-arch.

The invention relates to the technical field of machining part non-ideal surface generation, and particularly discloses a wavelet and fractal-considered assembly junction surface construction method which comprises the following steps: S1, according to an ideal mathematical model of an assembly junction surface, S2, comparing calculation methods of different fractal parameters, S3, aiming at the part assembly junction surface in different machining modes, calculating fractal fractal parameters according to a calculation method of the different fractal parameters; s4, the assembly junction surface is regarded as a structure formed by superposition of contours of different scales, S5, a power spectrum analysis method is introduced to analyze the surface contour curve characteristics of the assembly junction surface, and S6, according to the isotropic or anisotropic properties of the surface of the assembly junction surface in different machining modes, the surface contour curve characteristics of the assembly junction surface are analyzed. The statistical distribution characteristic parameters determined in the step S3 are introduced into characterization of the assembly joint surface; and S7, the contour curve characteristic parameters extracted in the step S4 are associated with the fractal parameters determined in the step S2. According to the method, multi-scale decomposition is carried out on the assembly joint surface through wavelet transform, and the specificity information of the roughness contour, the waviness contour and the shape error contour can be effectively extracted.

In low-energy electron diffraction (LEED), electron diffraction patterns are detected, and images can be formed based on electrons reflected and diffracted from a sample surface. Diffraction patterns can be generated by the interaction of relatively localized coherent electron beams incident on the sample surface (e.g., a selected region of the sample surface). Information from the diffraction patterns can be used to determine (or reconstruct) the structure on the sample surface. Advantageously, selected-area LEED (SA-LEED) or a combination of LEED and stacked imaging (to generate a series of diffraction patterns, each associated with a given particle beam position, wherein particle beams centered at adjacent positions partially overlap) can be used to determine the surface structure of semiconductor wafers via lensless imaging for defect inspection and / or other purposes.

The application relates to the technical field of non-ideal surface generation of machined parts, and particularly discloses a construction method of an assembly joint surface considering wavelet and fractals, which comprises the following steps: S1, according to an ideal numerical model of the assembly joint surface; S2, comparing calculation methods of different fractal parameters; S3, aiming at the assembly joint surface of parts under different machining modes; S4, regarding the assembly joint surface as a structure formed by superposition of different scale contours; S5, introducing a power spectrum analysis method to analyze the surface contour curve characteristics of the assembly joint surface; S6, according to the isotropic or anisotropic properties of the assembly joint surface under different machining modes, introducing the statistical distribution characteristic parameters determined in step S3 into the representation of the assembly joint surface; and S7, associating the contour curve characteristic parameters extracted in step S4 with the fractal parameters determined in step S2. Through multi-scale decomposition of the assembly joint surface by wavelet transform, the specific information of the roughness contour, the waviness contour and the shape error contour can be effectively extracted.

The invention provides a surface roughness quantification method with a hidden surface and a readable storage medium. The method comprises the following steps: acquiring an initial binary image; wherein the initial binary image comprises a surface profile curve with a hidden surface; fitting according to the surface profile curve to obtain a theoretical datum line; obtaining a reference binary image and an actual binary image corresponding to the reference binary image according to the theoretical reference line and the surface profile curve; the theoretical information entropy is obtained through calculation according to the reference binary image, the actual information entropy is obtained according to the actual binary image, the relative information entropy of the actual information entropy relative to the theoretical information entropy is obtained with the theoretical information entropy as the reference, and the relative information entropy is used for representing the surface roughness with the hidden surface. According to the method, the surface roughness of the hidden surface is quantified through the relative information entropy, and the surface roughness of different parts can be quantitatively evaluated by comparing the relative information entropy of the different parts.

The invention provides a method for improving overlay offset of an epitaxial layer, a super junction device and a manufacturing method of the super junction device. According to the method for improving the overlay offset of the epitaxial layers, at least two of a plurality of epitaxial layers serve as alignment layers, mark patterns used for photoetching alignment are manufactured in the alignment layers, the mark patterns are grooves located in the alignment layers, the mark pattern of the lower alignment layer affects the top surface contour of the first region of the upper alignment layer, and the mark pattern of the upper alignment layer is formed outside the first region, so that the photoetching overlay offset value of the plurality of epitaxial layers can be reduced, the photoetching rework rate can be reduced, the production cost can be reduced, and the production cycle can be shortened. According to the manufacturing method of the super junction device, mark patterns are arranged in a plurality of epitaxial layers by using the method for improving the overlay offset of the epitaxial layers. The super junction device is manufactured by using the manufacturing method of the super junction device.

The invention relates to an aerodynamic profile body with an outer flow surface for flow through a fluid, wherein the aerodynamic profile body comprises:a first surface layer and a second surface layer, which form at least part of the outer flow surface and are designed to be flexible in an end section of the aerodynamic profile body,a connection arrangement that flexibly connects the first surface layer to the second surface layer of the profile body in the end section, andan actuator device with at least one actuator provided in an interior of the aerodynamic profile body which interacts with at least one of the surface layers in the flexible end section in such a way that the cross-section of the aerodynamic profile body in the flexible end section can be changed by the at least one actuator,characterized in thatthe outer flow surface of at least one of the surface layers in the flexible end section has, at least in sections, a surface profile that extends parallel to the direction of flow.

The invention discloses a method for determining the position of a dam-surrounding seepage-proofing line, which comprises the following steps of: 1) drilling, and carrying out a seepage test and underground water level long-term observation in a drill hole; 2) drawing a contour line relative to the top surface of the impervious layer based on the result of the penetration test; based on the long-term observation data of the underground water level, an underground water level equal water level line is drawn; (3) based on the groundwater surface equal water level and the opposite impervious layer top surface contour line, a dam-surrounding seepage-proofing line is preliminarily planned; and (4) determining a dam-surrounding seepage prevention line. According to the method, the drilling coordinates are combined with detailed and comprehensive hydrogeological conditions such as underground water and rock-soil body permeability, and the optimal dam-surrounding seepage prevention line position is determined by comparing two schemes of the initially-planned underground water surface and the relatively-impervious layer top surface, so that the seepage prevention line position is determined on the premise that the dam-surrounding seepage safety is guaranteed. And the anti-seepage route is shortened, the engineering amount of the anti-seepage curtain is reduced, and the construction treatment cost is saved.

The invention provides a grinding track determining method, device and equipment. The method comprises the steps that surface contour points of a to-be-polished blade are collected, and an ideal contour track used for representing the surface contour of a standard blade is obtained based on a three-dimensional model of the standard blade; determining data characteristics of the actual contour trajectory to obtain an initial de-noised contour trajectory; for the initial de-noising contour trajectory, determining two trajectory points whose distance is smaller than a preset distance as a to-be-processed point pair; determining the semantic similarity of the to-be-processed point pair, and determining whether two track points forming the to-be-processed point pair are repeated points or not; if yes, the target track point in the to-be-processed point pair is reserved, and a target de-noised contour track is obtained; and the target de-noised contour track and the ideal contour track are registered, and a polishing track is determined. The polishing track determination method, device and equipment provided by the invention are used for accurately determining the polishing track of the engine blade.

This application relates to the field of testing equipment technology, and discloses a fixture for detecting the surface contour of a workpiece. The surface contour detection fixture includes: a fixed base, comprising: a receiving portion and a guiding portion, wherein the receiving portion is used to place the workpiece to be detected, and the guiding portion extends along the length direction of the workpiece; a movable clamp, movably disposed on the fixed base along the length direction of the workpiece, the movable clamp and the guiding portion engaging; and a detection device disposed on the movable clamp, the detection device being used to detect the surface contour of the workpiece. The surface contour detection fixture of this application, by using the movable clamp to drive the detection device to move along the entire length of the workpiece, can achieve continuous or high-density point detection of decorative strips or other long strip-shaped workpieces, thereby improving the accuracy of surface contour detection.

There is provided a system and method of process window qualification. The method includes obtaining a wafer comprising a plurality of dies respectively printed under a plurality of process window conditions characterized by varying values of focus and exposure, wherein the wafer is fabricated in accordance with a chip design containing a pattern of interest (POI) comprising a surface structure and an underneath structure; inspecting the wafer at POI locations to obtain a plurality of images each capturing an occurrence of the POI; and providing a group of measurements from the plurality of images, comprising, for each given image: extracting a surface contour of the surface structure and an underneath contour of the underneath structure; shifting one of the contours relative to the other one or more times to simulate one or more overlay variations; and measuring a critical metric between the contours following each shift.

The present application belongs to the technical field of metal plastic working, and relates to a method for identifying surface cracking of a blank during hot working of steel. The specific steps are as follows: obtaining an infrared image of the surface of the blank; identifying a contour region of the surface of the blank; calculating the median value of the temperature values or infrared radiation intensity values of all pixel points in the contour region of the surface of the blank, and performing noise reduction processing on the infrared image by using the median value; identifying and calibrating the bare metal surface and the oxide scale covered surface in the contour region of the surface of the blank; calculating the temperature or infrared radiation intensity gradient of each pixel point in the contour region of the surface of the blank; for each identified crack, performing fractal calculation to determine the morphology of the crack, and classifying the possible causes of the crack. The present application solves the problem of online automatic identification of surface cracking of high-temperature metal during hot working, avoids false positives and false negatives caused by manual monitoring, and can output crack morphology data to provide data for detailed technical analysis.

The invention belongs to the field of image data processing, and particularly relates to a positioning method and system for automobile part mold machining, and the method comprises the steps: extracting a plurality of edge closed contours from a collected mold region image before machining; calculating the possibility that each edge closed contour is a positioning hole according to the area, perimeter and distance distribution of edge points relative to the center of mass of each edge closed contour; according to the possibility, all edge closed contours are clustered, a plurality of suspected hole contours are screened out, and four rapid positioning holes are identified through geometric constraint; determining a center reference point of the die according to the positions of the four quick positioning holes, and calculating an offset vector of the die before processing relative to the center reference point of the standard die; and generating a compensation instruction, and driving numerical control equipment to adjust the pose of the mold. According to the method, interference of complex surface contours is effectively avoided, the positioning holes are accurately recognized, closed-loop accurate resetting of the position and posture of the mold is achieved, and the machining precision is improved.

Monitoring device (2) for optical monitoring of surfaces (10) of an object (1) on which objects (4) can be placed, wherein the monitoring device (2) comprises: - at least one optical sensor (20) which is / are configured to optically detect at least partial areas of a profile of the surface (10), and - a processing device which is in communication connection with the at least one optical sensor (20) and is configured to determine or store at least one reference profile of the surface (10) as a two-dimensional height profile (11) of the surface (10), and to process measured values ​​acquired during optical monitoring in such a way that it detects a deviation of a currently measured two-dimensional height profile (11) from the reference profile and, depending on the detected deviation, outputs a signal to communicate that an object (4) is located on the surface (10) and / or to prevent the release of an operation of the object (1), in particular in the case of a remote activation request, wherein, for the purpose of initializing the monitoring device (2), information regarding the surface structure of the two-dimensional height profile (11) is provided to the processing device, which it processes in such a way as tothat a reference profile of the surface (10) is generated from it.

The present application belongs to geological exploration technical field, disclose a kind of method for quickly obtaining core recovery and RQD value, to solve the problem of inaccuracy of core recovery and RDQ value caused by the large error of artificial measurement of core.The present application includes: (1) the core box that stores core is photographed, to obtain the picture with the outline of core box and the outline of several core outer surfaces: (2) the outline of core outer surface is preprocessed to obtain preprocessed core outer surface outline; (3) the dark area between adjacent preprocessed core outer surface outlines is deleted; (4) the length data of core box is obtained to calculate the length value of each preprocessed core outer surface outline; (5) the length value of the obtained core outer surface outline is used to calculate the core recovery and RQD value.The present application can obtain core recovery and RQD value by photographing, with the characteristics of fast speed and more accurate calculation of core recovery and RQD value.

The invention relates to the technical field of gear modeling, in particular to a face gear tooth surface modeling method and device, equipment, a storage medium and a computer program product. The method comprises the following steps: acquiring processed surface contour data of a to-be-processed face gear tooth surface under a plurality of processing parameters, and judging whether the to-be-processed face gear tooth surface has fractal characteristics or not based on the processed surface contour data; if yes, fractal characteristic parameters of the tooth surface of the to-be-processed face gear are determined according to the machined surface contour data; on the basis of the gear shaping machining principle, a tool tooth profile equation is constructed, the tool tooth profile equation is combined with the geometrical characteristic parameters of the face gear to be processed, and a tooth face description equation is obtained; the fractal characteristic parameters are embedded into the tooth surface description equation, and tooth surface fractal curved surface data points are obtained; and the data points of the fractal curved surface of the tooth surface are imported into the preset modeling tool to obtain the three-dimensional model of the target face gear, so that the modeling accuracy of the tooth surface of the face gear is improved.

A device for optically scanning surfaces and capturing surface profiles is proposed. For error correction (color edge effect), the evaluation unit is designed to compensate for local brightness gradients and color differences of a surface that is not homogeneous with respect to its optical scattering and reflection properties, so that these are not evaluated as changes in distance or surface profile. The evaluation unit is designed to capture the cross-sectional profile of the line and to detect any asymmetrical deviation of the cross-sectional profile from the Gaussian shape, interpreting it as a color difference and / or brightness gradient, and / or disregarding it for calculating distances or the surface profile, and / or replacing and correcting it with a substitute cross-sectional profile.

This invention discloses a double freeform surface lens and its design method. The inner and outer surface contour curves of the double freeform surface lens are both composed of multiple curve segments, each corresponding to a unit emission angle of an extended light source. These segments are smoothly connected and share a common tangent. The method includes: determining the maximum emission angle of the extended light source and dividing it equally to obtain the unit emission angle; constructing multiple circular arc curves with the center height of the inner and outer surfaces of the lens as the starting point and the unit emission angle as the step size; connecting the beginning and end of the multiple circular arc curves on the inner and outer surfaces to obtain the inner and outer surface contour curves of the double freeform surface lens; and optimizing the inner and outer surface contour curves to obtain the double freeform surface lens. By using this invention, high uniformity and high luminous efficiency can be obtained on the target plane when the ratio of lens height to light source diameter is less than 1.2. This invention can be widely applied in the field of optical device design.

This design relates to eye shades contoured to define separate eye recesses.The broken lines in the drawing form no part of the design to be patented.The strap portion is shown as part of the environment and is not claimed.The dashed lines representing pleating illustrate surface contour and form no part of the claimed design; their specific placement is not intended to be limiting.

The present application relates to the technical field of intelligent welding, and particularly relates to a welding method and system suitable for a multi-dimensional force sensor, which comprises setting a welding area, and shooting the welding area by a camera; a mounting block of the multi-dimensional force sensor is provided with a plurality of identification surfaces; the multi-dimensional force sensor is placed in the welding area, and a linear laser is obliquely irradiated from top to bottom and moves at a constant speed through the welding area; when the linear laser moves, the camera shoots an image every set time interval; laser pixel points of each image are identified, and each multi-dimensional force sensor and a corresponding contour grouping thereof are determined according to a laser shape; contour groupings of each multi-dimensional force sensor in corresponding images are merged to form a contour image of each multi-dimensional force sensor, and a center point and an identification surface contour are calculated, so as to determine a welding point position and welding action parameters of each multi-dimensional force sensor; and each welding point is welded according to the welding point position and the welding action parameters. The present application can effectively improve welding efficiency and welding quality.

The invention relates to a method and device for reinforcing a well mouth earth surface strongly-weathered rock stratum of a deep shaft. In the method for reinforcing the well mouth earth surface strongly-weathered rock stratum of the deep shaft, the ground is cleaned and leveled. A plurality of foundation piles are arranged in the circumferential direction of a wellhead of the deep vertical shaft, extend along the axis of the deep vertical shaft and partially extend into the strongly weathered rock stratum. The sides, close to the axis of the deep shaft, of the foundation piles form an inner contour line, circles of the foundation piles form a center loop line, and the inner side face contour line of the deep shaft is located between the inner contour line and the center loop line so as to determine the inner side face contour line of the deep shaft. And counter-pulling from the bottom of the deep shaft to the wellhead along the inner side profile of the deep shaft. According to the method, after the stable foundation piles are formed, the outline of the deep shaft is defined, then counter-pulling is conducted in the outline, the structural stability is guaranteed, the counter-pulling cutting part is mainly the structure of the foundation piles, therefore, the situation that loose blocks fall off is prevented, and the construction efficiency, safety and stability of the deep shaft are improved.

The utility model relates to the technical field of embedded head-up display complete machine product production, and particularly discloses a detection device for detecting an embedded head-up display complete machine product, which comprises a go-stop pin detection module, a reference positioning detection module, a curved screen detection module and an overturning setting module, the go and stop pin detection module can detect whether mounting holes and positioning pins are qualified, the reference positioning detection module can detect whether a reference surface is qualified, the curved screen detection module can detect whether the surface contour of the three-dimensional radian curved screen is qualified, and the overturning setting module can abut against the three-dimensional radian curved screen and cooperate with the curved screen detection module to detect whether the surface contour is qualified. According to the utility model, the parameters of the detection equipment are not required to be adjusted by professionals, the inexperienced personnel can quickly detect the complete machine product and output the detection report, the key size of the complete machine product can be efficiently detected, the cost is low, the operation is simple and easy to operate, the subjective judgment of the detection personnel is reduced, and the detection efficiency is improved. And the detection accuracy and the performance consistency of the whole machine product are improved.

Method for determining the contour of an object's surface along a measuring distance, in which the focus of a microscope objective relative to the surface is varied along a measuring axis (z-axis) over a scan area at measuring points spaced apart from each other along the measuring path and in which height signals representing the height of the surface are derived from images taken during variations in focus, characterized by that along the measuring path the scan area in Rich- The measurement axis (z-axis) of the contour is automatically tracked, with the scan area being shifted towards the object in the measurement direction when the height of the object is locally reduced based on the height signals determined along the measurement path, and shifted away from the object in the measurement direction when the height of the object is locally increased based on the height signals determined along the measurement path. that the contour of the surface is extrapolated from height signals determined along the measuring section to track the scan area.